<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>06-css常用样式.html</title>
</head>
    <style type="text/css">
        a{
             text-decoration: none;
        }
        table{
            border: gray solid;
            border-collapse: collapse;
        }
        td,th{
            border: rebeccapurple solid;
        }
    </style>
<body>
        <a href="http://www.baidu.com">百度</a>
        <table>
            <tr>
                <td>one</td>
                <td>two</td>
            </tr>
        </table>
</body>
</html>